update release notes for release 3.0.  In process went over everything and did some reorganization, started filling some long standing stubs and fixed some obsolete links and statements.
update release notes for release 3.0.  In process went over everything and did some reorganization, started filling some long standing stubs and fixed some obsolete links and statements.

lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview